error: unable to delete 'xxxx' : remote ref does not exist

[doggy8088]

I'd like to delete a remote tracking branch in local repository that already been deleted remotely. When clicking on the remote tracking branch in the Git History page. The git log shows error: unable to delete 'xxxx' : remote ref does not exist error. It should be able to remote a remote tracking branch when remote branch is not available (already been deleted).